Logarithms and Log Properties
DefinitionLogarithm Propertiesy=logbxis equivalent to x=bylogbb=1 logb 1=0logb bx=x bbgax=xExamplelogb(xy)=rlogbxlog5125=3 because 53=125logb(xy)=logbx+logbySpecial LogarithmsInx=logex natural loglogb(xy)=logbx−logbylog x=log10x common logwhere e=2.718281828KThe domain of logb x is x>0